Pinch off a small lump of meat, about the size of a raspberry and roll the lump into a ball in the palm of your hands. (Hazan says if you are good with your hands, you can try making 3 balls at a time. It turns out, I am not.) When all the meatballs have been shaped (a process that took less time than I had expected, just the same), roll them in the flour, 15 to 20 at a time. Place the floured meatballs in a strainer and shake it smartly to dispose of excess flour.